Chevrolet Trailblazer: which model years draw the most owner complaints?
7,166 complaints filed with NHTSA about the Chevrolet Trailblazer, model years 2000 to 2026. 2 model years stand out for the engine or transmission: 2002 (transmission 31×); 2021 (transmission 4.2×). Quietest mature years by complaint count: 2001, 2000, 2009. Counts of unverified owner reports, compared only with other years of the same model; not failure rates.
Complaints by model year
| MODEL YEAR | COMPLAINTS | VS OTHER YEARS | STANDS OUT | RECALLS |
|---|---|---|---|---|
| 2000 TrailblazerFEW REPORTS | 26 | quiet: 2 of 10 | 0 | |
| 2001 TrailblazerFEW REPORTS | 20 | quiet: 1 of 10 | 0 | |
| 2002 Trailblazer | 1,148 | transmission 31× | 13 | |
| 2003 Trailblazer | 901 | — | 8 | |
| 2004 Trailblazer | 1,081 | — | 2 | |
| 2005 Trailblazer | 1,465 | — | 2 | |
| 2006 Trailblazer | 1,108 | — | 8 | |
| 2007 Trailblazer | 732 | — | 5 | |
| 2008 Trailblazer | 193 | quiet: 4 of 10 | 0 | |
| 2009 TrailblazerFEW REPORTS | 27 | quiet: 3 of 10 | 0 | |
| 2014 TrailblazerFEW REPORTS | 1 | — | 0 | |
| 2021 Trailblazer | 201 | transmission 4.2× | 4 | |
| 2022 TrailblazerFEW REPORTS | 113 | — | 1 | |
| 2023 TrailblazerFEW REPORTS | 75 | — | 0 | |
| 2024 TrailblazerFEW REPORTS | 36 | — | 1 | |
| 2025 TrailblazerFEW REPORTS | 27 | — | 1 | |
| 2026 TrailblazerFEW REPORTS | 12 | — | 1 |
"Stands out" = 40 or more complaints naming that system and at least twice the model's quiet (lower-quartile) year, or twice the share seen across every vehicle of that model year. Newer years have had less time on the road. "Quiet" ranks only years with 7+ years on the road and 20+ complaints. NHTSA data through November 2026.
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Source: NHTSA public complaints, recalls, service bulletin and investigation databases, data received through November 2026. Complaints are unverified reports from owners, not failure rates: sales volumes are unknown, so a model year is only compared with other years of the same model. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Year pages: 20022003200420052006200720082021